a box on wheels that is pulled by a car and is used for taking things from one place to another

The car was pulling a trailer with a motorcycle on it. 这辆汽车拖着一辆挂车，挂车上面载着一辆摩托车。

the separate back part of a large truck

a wheeled vehicle for living or travelling in, especially for holidays, that contains beds and cooking equipment and can be pulled by a car

an advertisement for a film or a television or radio programme, consisting of short parts taken from it

I saw a trailer for the new series of "Game of Thrones" last night. 我昨晚看了新一季《权力的游戏》的预告片。